Industrial Automation Magazine India

Safety Sensor, RSS260

Published on : Saturday 04-09-2021

Integrated software logic enables efficient safety solutions.

The Schmersal Group has further developed its compact RSS260 safety sensor and equipped it with new software – the sensor now offers four additional, optionally selectable functions: Feedback loop monitoring, automatic restart/manual restart, reset, and emergency stop monitoring.

On the F0/F1 version, the RSS260 assumes the tasks of a safety relay module, i.e., monitoring of the movable safety guard as well as of the contactors directly actuated by the sensor outputs – monitoring is carried out by the integrated logic in the sensor, rendering a separate evaluation device unnecessary.  

On the F0 version, the machine restarts automatically as soon as all safety guards have been closed. An additional ‘enable button’, without edge monitoring, can be switched into the feedback loop. The F0 version is suitable for small machines without a protective space that can be accessed behind.

The F1 version is recommended for smaller systems, where the hazardous area can be accessed by the operator, as it has a reset function. The edge-monitored reset button must be pressed before the machine is restarted – when it is clear that the system is in a safe state and that no one is in the hazardous area. This function is consistent with the ‘manual reset function’ in accordance with EN ISO 13849-1.

The RSS260 with Q function is suitable for machines where the use of an EMERGENCY STOP switch is compulsory. EMERGENCY STOP switching elements integrated into a series circuit can be monitored by the Q function in the last sensor of the chain. This eliminates the need to install a separate safety circuit for the EMERGENCY STOP switches. The EMERGENCY STOP switching elements monitored by the Q function meet the requirements up to PL e. A reset button is required here as well, as no automatic restart of the machine is permitted after an EMERGENCY STOP command has been reset.

Schmersal India Pvt Ltd, Pune. Tel: 02138-614700. Email: [email protected]